PROMAC CATALOGUE 2019 2020 PROFESSIONAL METAL WORKING

TABLES
TABLES
TABLES INDUSTRIAL SUPPLIES GRINDING SAWING TURNING MILLING DRILLING
GRAIN SIZE AND HARDNESS
The grain numbers corresponding to the specific grain
sizes are defined according to an international standard
(see table). Very fine grains (micrograins: from grain size
230) are obtained by means of sludge.
Grain no.
Dimensions
mm
from
Dimensions
mm
to
8 2.83 2.00
10 2.38 1.68
12 2.00 1.41
14 1.68 1.19
16 1.41 1.00
20 1.19 0.84
24 0.84 0.60
30 0.71 0.50
36 0.60 0.42
46 0.42 0.30
54 0.35 0.25
60 0.30 0.21
70 0.25 0.18
80 0.21 0.15
90 0.18 0.13
100 0.15 0.11
120 0.13 0.09
150 0.11 0.06
180 0.09 0.05
220 0.075 0.045
240 0.047 0.043
280 0.038 0.035
320 0.031 0.028
400 0.018 0.016
500 0.014 0.012
600 0.010 0.008
800 0.008 0.006
1000 0.005 0.004
1200 0.004 0.003
Size of grain
very coarse
coarse
medium
fine
very fine
The roughness of the surface during sanding depends
more on the grinding and dressing processes than on
the selected grain size. The grinding wheels which were
machined for perfect handling are powerful but produce
rougher surfaces.
When sanding profiles or small radiuses, the grain size
has direct influence on the selection of the specification.
Therefore, the dressing process must be taken into
account.
Cutting power
Durability of edges /
surface finish
coarse medium fine very fine
20 – 36 46 – 80 90 – 220 240 – 600
Cutting power
Durability of edges / surface finish
HARDNESS
The concept of «wheel hardness» does not apply to the
abrasive material but on the contrary characterizes the
bonding strength compared to the breaking of the abrasive
grains. In other words, with a softer grinding wheel, the
grains break more easily than with a harder wheel. The
code letters from A to Z indicate the degree of hardness.
Here, the letter A represents the softest wheel and the
letter Z the hardest (see table).
Code letter
A / B / C / D
E / F
G / H
J / K / L
M / N / O / P
Q / R / S / T
U / V / W / X / Y / Z
Degree of hardness
extremely soft
very soft
soft
medium
hard
very hard
extremely hard
The hardness of the wheel also depends on the grain size
and the porosity. With wheels of the same hardness (e.g.
hardness F), the grinding wheels consisting of small grains
and having low porosity are «harder» during the sanding
thana grinding wheel with coarse grains and high porosity.
ZERSPANEN MACHINING AND VON CHIPPING STAHL OF STEELS HSS
Material
Low-alloy steel
and cast steel
up to 700 N / mm 2
E360; C45+QT; 60S22;
Low-alloy steel and
1.000 N / mm 2 34Cr4+QT
cast steel > 700 up to 36Mn5+QT; C45E+QT;
Low-alloy steel
and cast steel > 1.000
up to 1.300 N / mm 2
Steel from 1.300 to 1.600
N / m 2 , cold work spring
steel. Wear-resistant steel
360 – 440 HB
Hardened tool steel,
unalloyed
Tool steel, low-alloy,
hardened, steel ball
bearing, hardened
Tool steel, high-alloy,
hardened
Stainless steel, resistant
to acids and refractories,
cast steel
Stainless steel, resistant
to acids and refractories,
cast steel,
austenitic, sulphurized
Stainless steel, resistant
to acids and refractories,
cast steel
(Ni > 4%), austenitic
Material
Low-alloy steel
and cast steel
up to 700 N / mm 2
Values for drilling with HSS twist drills (according to Titex Plus and Garant)
Drilling diameter d (mm)
Cutting speed
Examples
2 4 6 8 10 20
v c
(m/ min)
Drive f (mm)
S235JR; C10+A; GE200;
C35; C10E+A;
20 – 50 0,03 – 0,05 0,06 – 0,10 0,08 – 0,15 0,07 – 0,20 0,13 – 0,23 0,25 – 0,375
16MnCr5+A; 20MnCr5+A
G46MnSi4; 36CrNi-
Mo4+QT; 42CrMo4+QT;
50CrMo4+QT
60SiMn5;
55NiCrMoV6+QT; 58CrV4;
16CrMo5 – 2
20 – 36 0,02 – 0,05 0,04 – 0,1 0,06 – 0,15 0,08 – 0,20 0,10 – 0,23 0,175 – 0,34
8 – 22 0,02 – 0,035 0,04 – 0,065 0,06 – 0,105 0,08 – 0,14 0,10 – 0,16 0,175 – 0,24
4 – 19 0,030 0,04 – 0,06 0,06 – 0,09 0,06 – 0,12 0,10 – 0,135 0,175 – 0,205
C110U; C135U; C85U 10 – 26 0,02 – 0,04 0,4 – 0,08 0,06 – 0,12 0,08 – 0,16 0,10 – 0,18 0,175 – 0,27
51CrV4; 60WCrV8;
55NiCrMoV6; 100Cr6
HS6-5 – 2C; X210Cr12;
X38CrMo16;
X37CrMoV5 – 1
X6CrAl13; X12Cr13;
GX7CrNiMo12-2;
X46Cr13+A; X17CrNi16-2
8 – 24 0,02 – 0,04 0,04 – 0,08 0,06 – 0,12 0,08 – 0,16 0,10 – 0,18 0,175 – 0,27
6 – 17 0,02 – 0,04 0,04 – 0,08 0,06 – 0,12 0,08 – 0,16 0,10 – 0,18 0,175 – 0,27
10 – 17 0,02 – 0,045 0,04 – 0,09 0,06 – 0,13 0,08 – 0,17 0,10 – 0,2 0,175 – 0,3
X8CrNiS18-9 10 – 20 0,02 – 0,03 0,04 – 0,06 0,06 – 0,09 0,08 – 0,12 0,10 – 0,135 0,175 – 0,205
X5CrNi18-10;
GX10CrNi18-8;
X6CrNiTi18-10
9,5 – 14 0,020 0,040 0,060 0,080 0,091 – 0,10 0,175 – 0,145
Values for drilling with HSS twist drills (according to Titex Plus and Garant)
Examples
S235JR; C10+A; GE200;
C35; C10E+A;
16MnCr5+A; 20MnCr5+A
E360; C45+QT; 60S22;
Low-alloy steel and
1.000 N / mm 2 34Cr4+QT
cast steel > 700 up to 36Mn5+QT; C45E+QT;
G46MnSi4; 36CrNi-
Low-alloy steel and
1.300 N / mm 2 50CrMo4+QT
cast steel > 1.000 up to Mo4+QT; 42CrMo4+QT;
Steel from 1.300 to 1.600
N / m 2 , cold work spring
steel. Wear-resistant steel
360 – 440 HB
Hardened tool steel,
unalloyed
Tool steel, low-alloy,
hardened, steel ball
bearing, hardened
Tool steel, high-alloy,
hardened
Stainless steel, resistant
to acids and refractories,
cast steel
Stainless steel, resistant
to acids and refractories,
cast steel,
austenitic, sulphurized
Stainless steel, resistant
to acids and refractories,
cast steel
(Ni > 4%), austenitic
60SiMn5; 55NiCrMoV6+QT;
58CrV4;
16CrMo5 – 2
Cutting speed
v c
(m / min)
Drilling diameter d (mm)
2 4 6 8 10 20
Drive f (mm)
31 – 67 0,03 – 0,06 0,06 – 0,12 0,10 – 0,18 0,11 – 0,24 0,14 – 0,275 0,275 – 0,41
25 – 60 0,02 – 0,06 0,04 – 0,12 0,06 – 0,18 0,09 – 0,24 0,11 – 0,275 0,187 – 0,41
7,5 – 42 0,02 – 0,04 0,04 – 0,08 0,06 – 0,12 0,09 – 0,16 0,11 – 0,18 0,187 – 0,27
6 – 19 0,02 – 0,025 0,04 – 0,05 0,06 – 0,075 0,09 – 0,1 0,11– 0,115 0,185 – 0,17
C110U; C135U; C85U 13 – 45 0,02 – 0,05 0,04 – 0,1 0,06 – 0,15 0,09 – 0,2 0,11 – 0,23 0,187 – 0,34
51CrV4; 60WCrV8;
55NiCrMoV6; 100Cr6
HS6-5 – 2C; X210Cr12;
X38CrMo16;
X37CrMoV5 – 1
X6CrAl13; X12Cr13;
GX7CrNiMo12-2;
X46Cr13+A; X17CrNi16-2
10 – 45 0,050 0,04 – 0,1 0,06 – 0,15 0,09 – 0,2 0,11 – 0,23 0,187 – 0,34
7,5 – 28 0,050 0,04 – 0,1 0,06 – 0,15 0,09 – 0,2 0,11 – 0,23 0,187 – 0,34
13 – 28 0,02 – 0,06 0,04 – 0,12 0,06 – 0,18 0,240 0,11– 0,275 0,187 – 0,41
X8CrNiS18-9 13 – 34 0,02 – 0,035 0,04 – 0,065 0,06 – 0,105 0,140 0,11 – 0,16 0,187 – 0,24
X5CrNi18-10;
GX10CrNi18-8; X6CrNi-
Ti18-10
10 – 19 0,02 – 0,025 0,04 – 0,05 0,060 – 0,075 0,100 0,11 – 0,115 0,187 – 0,17
TABLES INDUSTRIAL SUPPLIES GRINDING SAWING TURNING MILLING DRILLING
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